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View Full Version : The new Banebots Wheel System



Adrenalynn
10-09-2008, 02:47 PM
Hey TR guys - can we talk a bit about your new Banebots Wheel/Hub System (http://www.trossenrobotics.com/store/c/3266-BaneBots.aspx)? I know it's "coming soon" for description, but how do they work?

No pricing on the hubs, but the wheel pricing is crazy-good, imho - designing this new SO competition bot package for the kids, I'm shopping for motive power right now.

How/what's needed to mount those puppies up on something like your Banebots MP-28020-385 (http://www.trossenrobotics.com/store/p/4224-20-1-28mm-Planetary-Gearmotor-RS-385-Motor.aspx)? [800+ RPM @ ~200 oz-in @ 7.2v? YUM!]

Can the hubs be run "free" on an appropriately-sized shaft axle for non-driven wheels?

These could easily be the "answer to my prayers". I'm super-excited about these. I love the Banebots motors but getting their power to the asphalt has always been a bit of a challenge. Little info, please?

Donkey Shin!

DresnerRobotics
10-09-2008, 02:58 PM
Your ability to know of every little change we make to our site scares the crap out of me.

We're going to be creating grid pages that match up what wheels work with what hubs, and what hubs work with what motors, etc.

The motors you mentioned have a 6mm shaft diameter, so they would match up with the 6mm Motor Shaft Diameter Hubs, which are offered in the 1/2" Hex Mount Wheel variety with 3 options on hub length, allowing you to stack 3 wheels side by side to make an extra wide wheel. Any wheel with a 1/2" Hex Mount would work with those.

It's still a work in progress, I'm adding the hubs right now and will link them in to the Hub grid when I'm done.

Adrenalynn
10-09-2008, 03:22 PM
Sorry - I'm always shopping and plotting the demise of my competition. :)

Appreciate the quick feedback! Any ideas yet on the cost of hubs - and when I can order? :tongue:

Hmm, so I could put two wheels per side, about 4" total width, for the driven wheels, and one wheel per side for the free wheels in order to give them less traction for slip/skid?

lnxfergy
10-09-2008, 04:11 PM
Banebots does sell these direct, so approximate prices and more info is out there: http://banebots.com/c/WHB

http://banebots.com/pc/WHB-HS-M6/T40H-SM62 has a little more info about the mounting.

I've got a pair of the green 3-7/8" diameter 1/2" hex ones on my latest robot (coupled to Lynxmotion 6mm output shaft motors). I think the green are the softest ones... and wow, they have grip. I think it ran me about $10 for a pair of wheels and mounts.

-Fergs

Matt
10-09-2008, 04:16 PM
We have it in stock, Andrew should be done with the new pages by tomorrow :) And yes, if we don't have exactly what you need there is a larger selection over at Banebots. We have tried to stock the core items that will solve 95% of peoples needs.

Adrenalynn
10-09-2008, 04:16 PM
Awesome, Fergs! Wonder if I can +rep you again? This is exactly what I needed, and I appreciate your input on their traction.

Are you running two wheel drive four wheel slip-skid by chance? If so, can I ask what your wheel base geometry looks like?

[edit] Thanks, Matt! It's an awesome addition to the catalog, imho - *much* needed over those incredibly pricey solutions I've seen. (where a hub is ~$10, a wheel is ~$10, a tire is ~$15 - ouch!)

[edit again] The "yellowish" looking ones are the green tread compound, 30 Shore A. Orange is medium, 40 Shore A, Blue is hardest, 50 Shore A.

lnxfergy
10-09-2008, 04:17 PM
Can the hubs be run "free" on an appropriately-sized shaft axle for non-driven wheels?

In the stock configuration, I think that is a no. The hex hub has a set screw(s) that attaches it to the shaft of the motor output. Then the wheel slides onto the hex, and a locking clip slips onto the hex to hold the wheel in place.

Obviously, the hex mating to the wheel can't be made to rotate, and if you don't put the set screws in place, the hex hub will fall off the motor shaft.

However, maybe you can use two hex hubs to do this (an inner one, with the wheel on it, not using the set screw, and an outer one that is attached with a set screw and holds the inner one and the wheel from sliding off the end of the shaft...). Not sure it's the best way, but it could be one way...

EDIT: I guess I'm wrong, they sell bushings!: http://banebots.com/pc/WHB-HM-HS4-M6/T40H-BM62

-Fergs

lnxfergy
10-09-2008, 04:21 PM
Awesome, Fergs! Wonder if I can +rep you again? This is exactly what I needed, and I appreciate your input on their traction.

Are you running two wheel drive four wheel slip-skid by chance? If so, can I ask what your wheel base geometry looks like?

No, I'm running a differential drive with omni-directional casters:

http://forums.trossenrobotics.com/gallery/files/1/7/6/8/ss3_thumb.jpg (http://forums.trossenrobotics.com/gallery/showimage.php?i=691&c=member&imageuser=1768)

This was a quick "hey are these parts the right size" mock up. There will be two omni-directional casters in the back under the AVR-ISP box. Interestingly enough, the AVR-ISP box was almost exactly the same size as the Dell Mini 9...

-Fergs